CN2216295Y

CN2216295Y - Energy-saving noiseless ac contactor

Info

Publication number: CN2216295Y
Application number: CN 94230792
Authority: CN
Inventors: 李梦彪
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-11-16
Filing date: 1994-11-16
Publication date: 1995-12-27
Anticipated expiration: 2004-11-16

Abstract

The utility model relates to an energy saving noiseless AC contactor, which is used for solving the problems of large energy consumption of the prior art, large noise of the prior art, etc. The utility model is characterized in that a circuit board is added on an original AC contactor, a transistor circuit is arranged on the circuit board, and output ends (14), (15), (16) are connected with an outer control circuit. The working performance of the utility model is good, and the utility model can be widely used for the control of electrical equipment.

Description

Energy-saving noiseless ac contactor

The utility model relates to a kind of low-voltage electrical apparatus control element, particularly a kind of energy-saving noiseless A.C. contactor.

At present, the running of most of motors or electric equipment and shutdown just can make its operate as normal must for the sucking coil energising in the A.C. contactor by A.C. contactor control.The sucking coil of this contactor is switched on for a long time, has consumed a large amount of electric energy, and coil generates heat because of long-time energising, makes it accelerate to damage and influence useful life.In this contactor, in order to reduce magnetic loss and eddy current loss, its iron core is made of silicon steel sheet, so complex manufacturing technology, the cost height.In addition, this A.C. contactor dispels the heat for the ease of coil, volume is done greatlyyer, and when work, be attended by the converter noise, especially when operating voltage is low, can make the main contact loose contact because of exchanging vibration, influence the operate as normal of Be Controlled electric equipment, also can burn out main contact because of the main contact loose contact starting the arc of generating heat.Its service behaviour and reliability are relatively poor.

The purpose of this utility model is to overcome the deficiency of above-mentioned prior art, and a kind of well behaved energy-saving noiseless A.C. contactor is provided.

The purpose of this utility model is achieved in that it equally with existing A.C. contactor includes a housing 10, is provided with fixed core 1, moving unshakable in one's determination 3, sucking coil 2 in it.Moving iron core 3 becomes one by a latch with connected body 4.Connected body 4 upper ends are provided with holddown spring 6 and active contact 7, and initiatively two contacts of contact 7 are corresponding with main fixed contact input 5 and main fixed contact output 8 respectively.Also be provided with two pairs of auxiliary contacts 12 on the connected body 4, form two pairs of normally closed auxiliary contacts 11 and two pairs and often open auxiliary contact 13.Unique distinction of the present utility model is: also be provided with a circuit board 9 in housing 10, it is provided with transistor circuit, and

output

14,15,16 is connected with outer control circuit.

Above-mentioned said transistor circuit is made up of bridge rectifier S1 and bridge rectifier S2, and wherein, the interchange end 14 of S1, another interchange end 16 join with transformer L input U1 one end.S1 direct-flow positive pole and normally closed auxiliary contact 11 join, the other end of contact 11 and sucking coil 2 join, join to often opening auxiliary contact 13 with another simultaneously, the positive pole of the other end of contact 13 and diode Z joins, and diode cathode joins simultaneously with bridge rectifier S2 positive pole and capacitor anode.The other end of the negative pole of the negative pole of S2, capacitor A, sucking coil 2 and the negative pole of S1 join simultaneously.The interchange end of circuit S2 and transformer L output U2 join.The input U1 other end of transformer L and another join to often opening auxiliary contact 13, another termination 15 of contact 13.

Above-mentioned said sucking coil 2, its iron core are to be made by mild steel.

The utility model compared with prior art has lot of advantages.

1. can save a large amount of electric energy.Original A.C. contactor is finished the control action of motor or electric equipment by sucking coil " energising " or " outage ".Want to make the continuous operation of Be Controlled electric equipment, sucking coil will be switched on continuously.And the utility model is by sucking coil 2 moments feeding 380V(or 220V, 110V) just outage, and feed low-voltage DC rapidly to produce needed magnetic force, finish the main contact closure and make its operate as normal.The sucking coil that has fundamentally solved original A.C. contactor consumes electric problem in a large number, as: the power of the A.C. contactor sucking coil consumption that original specification is 40A is 32VA, and the operating voltage of the utility model when work sucking coil is 10V, electric current is 0.03A, consumed power is 10VXO.03A=0.3W, compare with former A.C. contactor, power saving rate is

(32－0.3)/32 ×100％＝99.06％，

The utility model economize on electricity of other specification is also all more than 99%.As seen, it is minimum that sucking coil of the present utility model and the sucking coil of original A.C. contactor are compared power consumption, the power savings highly significant.

2. can prolong the life-span of sucking coil, save a large amount of enamelled wires.Feed high voltage because of the sucking coil in the utility model 2 is moment, enter only 0.2W(40A of sucking coil 2 consumes after the operating state power), so sucking coil can not generate heat, can increase the service life more than 10 times.

3. can save a large amount of silicon steel sheets.Because compole was short when sucking coil fed high voltage, can consider magnetic loss and eddy current loss.Can adopt cheap, the simple mild steel making of processing iron core, make it save a large amount of silicon steel sheets.

4. volume is little, compact conformation.From the magnetic force formula

F= (10 ⁷)/(16π) ·B ²·S

Can find out electromagnetic force F be proportional to magnetic induction density B square, be proportional to area of core section S.But magnetic loss unshakable in one's determination increases with the increase of magnetic induction density B, and in order to reduce magnetic loss, former A.C. contactor can not arbitrarily improve B and reduce area of core section S.And the utility model feeds high-tension characteristics and makes it needn't consider magnetic loss unshakable in one's determination because of moment, can improve magnetic induction density B and reduces area of core section S.In addition, because the utility model sucking coil consumed power is minimum, also need not consider heat radiation, therefore, it is little to the utlity model has volume, and the characteristics of compact conformation are convenient to various occasions and are installed and used.

5. there is not AC noise, reliable working performance.The utility model produces magnetic force work by feeding low-voltage DC, does not therefore have AC noise, has improved operational environment.Also avoided simultaneously having good working performance because of exchanging all negative consequences that vibration is produced the main contact loose contact.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a structural representation of the present utility model.Among the figure, 1 is fixed core, and 2 is sucking coil, and 3 for moving unshakable in one's determination, 4 are connected body (being used to connect moving iron core 3 and active contact 7), 5 is main fixed contact input (3), and 6 are holddown spring (being used to make 5,7,8 contacts well), and 7 is (3 of active contacts, be used to connect 5,8 and realize that circuit turn-on and

disjunction

5,8 disconnect circuit), 8 is main fixed contact output (3), and 9 is the transistor circuit plate, and 10 is housing.

Fig. 2 is connected body 4 and a parts enlarged drawing thereof among Fig. 1.Among the figure, 11 is normally closed auxiliary fixed contact (about each a pair of), and 12 are auxiliary moving contact (about each a pair of, with connected body 4 knee-actions, realize 11 and 13 conducting and disjunction), and 13 for often opening auxiliary fixed contact (about each a pair of).

Fig. 3 is circuit theory diagrams of the present utility model.Among the figure, K1, K2 are the control button switch, and double dot dash line is interior to be the utility model internal circuit schematic diagram, and 14,15,16 is the utility model output, are used for being connected with outer control circuit, so that realize manual or control automatically.

Each structure shown in the drawings and circuit are exactly embodiment of the present utility model.During actual fabrication, transistor circuit is arranged on the printed circuit board (PCB) 9, and this circuit board is fixed in the housing with bolt, and it is become one.14,15,16 respectively with housing on three binding posts join.Four installing holes are also arranged at the utility model bottom, and available bolt or screw are installed in power distribution cabinet or the operating desk.

The utility model work the time be by S1 with 380V(or 220V, 110V) AC rectification becomes direct current to send into outage again behind the sucking coil 2 (because sucking coil 2 connect automatic outage the in moving action unshakable in one's determination back with a pair of normally closed auxiliary contact 11 itself).With opening auxiliary contact 13 closures often, transformer L input U1 conducting, transformer L output U2 forms the loop by diode Z and Chang Kai auxiliary contact 13 with sucking coil 2 after the S2 rectification, sucking coil 2 produces magnetic force and reaches the purpose that main contact " closure " makes its operate as normal under the direct voltage effect.When button switch K 1 action, the sucking coil decompression, moving unshakable in one's determination 3 drive initiatively under action of reset spring, and contact resets, and main contact recovers " often opening " state, thus the utility model quits work.

Claims

1, a kind of energy-saving noiseless A.C. contactor includes a housing (10), is provided with fixed core (1), moving (3), sucking coil (2) unshakable in one's determination in it, and moving (3) unshakable in one's determination become one by a latch with connected body (4); Connected body (4) upper end is provided with holddown spring (6) and active contact (7), and initiatively two contacts of contact (7) are corresponding with main fixed contact input (5) and main fixed contact output (8) respectively; Also be provided with two pairs of auxiliary contacts (12) on the connected body (4), form two pairs of normally closed auxiliary contacts (11) and two pairs and often open auxiliary contact (13); It is characterized in that: also be provided with a circuit board (9) in housing (10), it is provided with transistor circuit, and output (14), (15), (16) are connected with outer control circuit.

2, energy-saving noiseless A.C. contactor according to claim 1, it is characterized in that: above-mentioned said transistor circuit is made up of bridge rectifier (S1) and bridge rectifier (S2), wherein, interchange end (14) (S1), another interchange end (16) join with transformer (L) input (U1) end; (S1) direct-flow positive pole and normally closed auxiliary contact (11) join, (11) the other end and sucking coil (2) join, join to often opening auxiliary contact (13) with another simultaneously, (13) the other end and diode (Z) positive pole joins, and diode cathode and bridge rectifier (S2) positive pole and capacitor anode join simultaneously; The other end of negative pole (S2), capacitor (A) negative pole, sucking coil (2) and negative pole (S1) join simultaneously; (S2) interchange end and transformer (L) output (U2) join; Input (U1) other end of transformer (L) and another join another termination (15) of (13) to often opening auxiliary contact (13).

3, energy-saving noiseless A.C. contactor according to claim 1, it is characterized in that: above-mentioned said sucking coil (2), its iron core are to be made by mild steel.